In article ,
Bill wrote:
On the Gemini ships, what did they use for OAMS and RCS thruster fuel?

N2O4/MMH, like the Apollo CM and SM. That propellant combination was just
becoming prominent then.

I think the Mercury spacecraft used hydrogen peroxide across a silver
screen in the combustion chamber.

Correct; *that* approach was just on its way out at the time. The
Gemini bipropellant thrusters had considerably better performance, and
originally looked like they would cause fewer hassles. (It's not clear
that they really did...)
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